References of "2011"
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See detailGeoelectrical monitoring on a contaminated site during biostimulation
Caterina, David ULg; Nguyen, Frédéric ULg

Poster (2011, December 01)

In Belgium, as in many other countries, relatively anarchic economical and industrial development of the past century has resulted in a significant number of contaminated sites. When one of these sites ... [more ▼]

In Belgium, as in many other countries, relatively anarchic economical and industrial development of the past century has resulted in a significant number of contaminated sites. When one of these sites poses a risk to human or ecosystem, measures need to be taken to clean it up. Among these measures, methods using in situ bioremediation are beginning to become more important because of their ease of implementation and their relatively low cost. However, it is often difficult to ensure their effectiveness except by carrying out extensive drilling and sampling, which can be long and expensive while offering only punctual information. Thus it becomes necessary to use other techniques to overcome these shortcomings. Recently, an increasing interest is being born to use geophysical methods as tools for remediation monitoring. As part of our work, we conducted several electrical resistivity tomography campaigns on a site contaminated by LNAPLs (gasoline) on which a biostimulation remediation device was set up. The aim of our investigations was to study the electrical response of the contaminated area during the remediation phase and whether electrical resistivity tomography allowed to monitor its effectiveness. After a year of monitoring, the time lapse images obtained show a significant decrease of the electrical resistivity (up to -50%) at the location of the main contaminant plume. This particular response during the biostimulation, in agreement with the models presented by several authors in the literature, tends to suggest that it is possible to use electrical resistivity tomography as a tool for qualitative control during the remediation. These findings may also lead in the future to the development of models to estimate more quantitatively the level of (de)contamination of a site. [less ▲]

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See detailHigh-contrast Stellar Observations within the Diffraction Limit at the Palomar Hale Telescope
Mennesson, B.; Hanot, Charles ULg; Serabyn, Eugene et al

in Astrophysical Journal (2011), 743

We report on high-accuracy high-resolution (<20 mas) stellar observations obtained with the Palomar Fiber Nuller (PFN), a near-infrared (sime2.2 μm) interferometric coronagraph installed at the Palomar ... [more ▼]

We report on high-accuracy high-resolution (<20 mas) stellar observations obtained with the Palomar Fiber Nuller (PFN), a near-infrared (sime2.2 μm) interferometric coronagraph installed at the Palomar Hale telescope. The PFN uses destructive interference between two elliptical (3 m × 1.5 m) sub-apertures of the primary to reach high dynamic range inside the diffraction limit of the full telescope. In order to validate the PFN's instrumental approach and its data reduction strategy, based on the newly developed "Null Self-Calibration" (NSC) method, we observed a sample of eight well-characterized bright giants and supergiants. The quantity measured is the source astrophysical null depth, or equivalently the object's visibility at the PFN 3.2 m interferometric baseline. For the bare stars α Boo, α Her, β And, and α Aur, PFN measurements are in excellent agreement with previous stellar photosphere measurements from long baseline interferometry. For the mass-losing stars β Peg, α Ori, ρ Per, and χ Cyg, circumstellar emission and/or asymmetries are detected. Overall, these early observations demonstrate the PFN's ability to measure astrophysical null depths below 10[SUP]-2[/SUP] (limited by stellar diameters), with 1 σ uncertainties as low as a few 10[SUP]-4[/SUP]. Such visibility accuracy is unmatched at this spatial resolution in the near-infrared and translates into a contrast better than 10[SUP]-3[/SUP] within the diffraction limit. With further improvements anticipated in 2011/2012, a state-of-the-art infrared science camera and a new extreme adaptive optics system, the PFN should provide a unique tool for the detection of hot debris disks and young self-luminous sub-stellar companions in the immediate vicinity of nearby stars. [less ▲]

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See detailChronique bibliographique - Supplément 2000-2004
Veymiers, Richard ULg; Bricault, Laurent; Budischovsky, Marie-Christine et al

in Veymiers, Richard; Bricault, Laurent (Eds.) Bibliotheca Isiaca II (2011)

Chronique bibliographique qui, sur le modèle de "l’Inventaire Bibliographique des Isiaca" (IBIS), publié dans les "ÉPRO" entre 1972 et 1991, recense, avec un commentaire critique, les publications ... [more ▼]

Chronique bibliographique qui, sur le modèle de "l’Inventaire Bibliographique des Isiaca" (IBIS), publié dans les "ÉPRO" entre 1972 et 1991, recense, avec un commentaire critique, les publications touchant aux cultes isiaques entre 2000 et 2004. [less ▲]

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See detailL’onde F dans tous ses états
WANG, François-Charles ULg; Massart, Nicolas ULg; Kaux, Jean-François ULg et al

in Revue Neurologique (2011), 167

F-waves result from the discharge of the motoneurons following their antidromic activa- tion. The F-wave appears, as an indirect (the F-wave latency decreases when the stimulation site moves away from the ... [more ▼]

F-waves result from the discharge of the motoneurons following their antidromic activa- tion. The F-wave appears, as an indirect (the F-wave latency decreases when the stimulation site moves away from the muscular detection) and late response (occurring after the M response). In practice, the most useful parameter is the F-wave minimal latency, provided that at least seven distinct F-waves are evoked. When the analysis is relative either to the controlateral side, or to a former examination, this parameter is one of most sensitive in electroneuromyography. F-wave evocation implies conduction along the entire peripheral nervous system, and particularly its proximal part, which is not investigated by nervous trunks conduction velocity studies. Thus, F wave study is the most useful in plexopathies and polyradiculonevritis. In the early phase of Guillain-Barre ́ syndrome, their absence may be the unique sign indicative of proximal conduction blocks. [less ▲]

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See detailGuide destiné à la formation d’animateurs pour les « animations pédagogiques »
Schiffers, Bruno ULg; Gilson, Julien; Prunier, Emmanuelle et al

Book published by édité par le COLEACP (2011)

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See detailL'étendue du recours direct de l'employeur public : enfin une réponse
Wildemeersch, Jonathan ULg

in Forum de l'Assurance (2011), 119

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See detailQuantile regression in nonparametric location-scale models with censored data
Heuchenne, Cédric ULg; Van Keilegom, Ingrid

Conference (2011, December)

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See detailLarge-Scale Fire Test of Unprotected Cellular Beam Acting in Membrane Action
Vassart, Olivier; Bailey, C. G.; Hawes, M. et al

in Journal of Structural Fire Engineering (2011), 2(4), 259-268

This paper describes a full scale fire test performed the 27th of February 2010 on a composite floor for analysing the possibility of tensile membrane action to develop when the unprotected steel beams in ... [more ▼]

This paper describes a full scale fire test performed the 27th of February 2010 on a composite floor for analysing the possibility of tensile membrane action to develop when the unprotected steel beams in the central part of the floor are made of cellular beams. The natural fire was created by a wood crib fire load of 700 MJ/m2 and the 9 × 15 m floor survived the fire that peaked at 1000°C and lasted for 90 minutes. Blind predictions of the air temperature development by the software OZone and of the structural behaviour by the software SAFIR which proved quite satisfactory are also described. [less ▲]

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See detailAssessing the Proximity of Time Evolutions through Dynamic Time Warping
Fabozzi, Davide ULg; Van Cutsem, Thierry ULg

in IET Generation, Transmission & Distribution (2011), 5(12), 1268-1276

Comparing time-series is a frequent task in many scientific fields. In power systems, in particular, it may be of interest to compare the outputs of a simplified and a detailed model, or to validate the ... [more ▼]

Comparing time-series is a frequent task in many scientific fields. In power systems, in particular, it may be of interest to compare the outputs of a simplified and a detailed model, or to validate the output of a model with respect to a measured time response. The classical Euclidean distance, involving pairs of points of the two data series aligned in time, is not suited to the practical time evolutions met in power systems, which often involve variable time delays and jumps at discrete times. In this paper, an alternative measure of proximity, stemming from other scientific fields, is proposed for power system applications. It consists in warping the time axis to guarantee the best match between the two time-series, i.e. it maps points on two curves that are not aligned in time so as to minimize the sum of squared differences of their ordinates. Modifications and adaptations of the classical algorithm to better fit power system problems are discussed. The method is illustrated through three representative curve comparison problems. A multi-dimensional extension allowing system-wide measures of similarity is also proposed. [less ▲]

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See detailRelaxation schemes for min max generalization in deterministic batch mode reinforcement learning
Fonteneau, Raphaël ULg; Ernst, Damien ULg; Boigelot, Bernard ULg et al

in 4th International NIPS Workshop on Optimization for Machine Learning (OPT 2011) (2011, December)

We study the min max optimization problem introduced in [Fonteneau, 2011] for computing policies for batch mode reinforcement learning in a deterministic setting. This problem is NP-hard. We focus on the ... [more ▼]

We study the min max optimization problem introduced in [Fonteneau, 2011] for computing policies for batch mode reinforcement learning in a deterministic setting. This problem is NP-hard. We focus on the two-stage case for which we provide two relaxation schemes. The first relaxation scheme works by dropping some constraints in order to obtain a problem that is solvable in polynomial time. The second relaxation scheme, based on a Lagrangian relaxation where all constraints are dualized, leads to a conic quadratic programming problem. Both relaxation schemes are shown to provide better results than those given in [Fonteneau, 2011]. [less ▲]

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See detailMath et Manips à l'école primaire. Favoriser l'apprentissage des grandeurs par des manipulations
Guissard, Marie-France; Henry, Valérie ULg

in Losanges (2011), 15

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See detailFibrosis and pulmonary function tests - New therapeutic options for respiratory diseases.
Clercx, Cécile ULg

in Proceedings of the Meeting of German specialists in internal medicine (ECVIM-CA-Internal Medicine) - Viernheim - 3rd December 2011 (2011, December)

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See detailFounding Rome Anew. Pope Sixtus IV and the Foundation of the Ponte Sisto, 1473
Schraven, Minou ULg

in Delbeke, Maarten; Schraven, Minou (Eds.) Foundation, Dedication and Consecration in Early Modern Europe (2011)

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See detailConstrained sparse estimation for improved fault isolation
Borguet, Sébastien ULg; Léonard, Olivier ULg

in Journal of Engineering for Gas Turbines & Power (2011), 133(12), 121602

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See detailPreliminary insight into seed effectiveness of western lowland gorilla (Gorilla g.gorilla)
Petre, Charles-Albert ULg; Tagg, Nikki; Beudels-Jamar, Roseline et al

in Primate Tidings (2011, December), 25

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See detailThe European Union Peacebuilding Approach: Governance and Practices of the Instrument for Stability
Natorski, Michal ULg

Book published by Peace Research Institute Frankfurt am Main (2011)

This report comments on EU peacebuilding practices in the light of different strands of the liberal peacebuilding paradigm. Due to the fact that there is no comprehensive and complete EU strategy on ... [more ▼]

This report comments on EU peacebuilding practices in the light of different strands of the liberal peacebuilding paradigm. Due to the fact that there is no comprehensive and complete EU strategy on peacebuilding, Michal Natorski focuses on the practices pursued using the Instrument for Stability (IfS). He analyzes governance practices during the implementation of the IfS and, assesses qualitatively the use of its different tools. Finally he tries to draw conclusions from his findings for the prospective orientation of the European External Action Service, especially in regard to its peacebuilding and conflict prevention policy. [less ▲]

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See detailLa puissance: débat autour des jeux et enjeux du pouvoir
Wintgens, Sophie ULg; Piet, Grégory ULg

Book published by Editions de l'Université de Liège (2011)

Detailed reference viewed: 76 (25 ULg)
See detailChronique bibliographique - 2005-2008
Veymiers, Richard ULg; Bricault, Laurent; Budischovsky, Marie-Christine et al

in Bricault, Laurent; Veymiers, Richard (Eds.) Bibliotheca Isiaca II (2011)

Chronique bibliographique qui, sur le modèle de "l’Inventaire Bibliographique des Isiaca" (IBIS), publié dans les "ÉPRO" entre 1972 et 1991, recense, avec un commentaire critique, les publications ... [more ▼]

Chronique bibliographique qui, sur le modèle de "l’Inventaire Bibliographique des Isiaca" (IBIS), publié dans les "ÉPRO" entre 1972 et 1991, recense, avec un commentaire critique, les publications touchant aux cultes isiaques entre 2005 et 2008. [less ▲]

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See detailDroit international privé
Pfeiff, Silvia ULg

in Droit des personnes et des familles : chronique de jurisprudence 2005-2010 (2011)

Detailed reference viewed: 64 (14 ULg)